Noise Source Identification with acoustical array

PULSE owners can perform noise source identification using array acoustics. A complete 18-channel combination array with a 35 cm diameter, based on LAN-XI front ends in a C-frame is offered with Beamforming Application Type 8608.

The system provides a resolution of 0.7 x wavelength for the mid- to high-frequency range of 1000-6400Hz when the array is positioned at 25 cm from the surface of the source. For measurements over a wide frequency range, the Wideband Holography BZ-5644 can be purchased as an option. If you need to make measurements of a vehicle run-up, the Transient Calculations BZ-5636 will be needed, together with an extra module for the tachometer signals. The system provides a resolution of 0.7 x wavelength for the mid- to high-frequency range of 1000-6400Hz when the array is positioned at 25 cm from the surface of the source. If you need to make measurements of a vehicle run-up, the Transient Calculations BZ-5636 will be needed, together with an extra module for the tachometer signals.

An overview of the Noise Source Identification applications and the principle options

The 18-channel array positioned to measure rattling noises on a go-cart that is being excited by vibration shakers

The position of the sources and the sound power of user-defined areas are easily obtained using the array acoustics post-processing tool